US4087471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fixed bed process for the production of t-butanol
Assignee: Texas Petrochemicals Corp
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Filing: 1977-05-20
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Granted: 1978-05-02
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Expires: 1997-05-20
Abstract
Abstract An improved process for the preparation of tertiary butyl alcohol comprising passing isobutene and water in a molar ratio of water to isobutene in the range of 0.06 to 0.24 : 1 or preferably less than 0.2 : 1 through a fixed bed acidic cation exchange resin, producing only a hydrocarbon phase, removing the hydrocarbon phase, splitting the hydrocarbon phase, and recycling a portion thereof to the reaction. The recycle provides the means to control the temperature of the reaction by cooling the recycle, and suppresses or inhibits the production of isobutene polymers.
Inventors
- 👤 William G. Bowman
- 👤 William P. Stadig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:16
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/03; C07C29/04
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
96 words
A process for the preparation of t-butanol comprising passing water and isobutene in a mol ratio of water:isobutene in the range of 0.06 to 0.24:1 through a fixed bed of acidic cation exchange resin catalyst in liquid phase at a temperature in the range of 65° to 150° C for a sufficient time to react water and isobutene, producing only a hydrocarbon phase, recovering said hydrocarbon phase, containing t-butanol, splitting said hydrocarbon phase, cooling one portion thereof to a temperature in the range of 15° to 110° C and recycling the cooled portion to the reaction.
Claim 2
Dependent Claim
96 words
A process for the preparation of t-butanol comprising passing water and isobutene in a mol ratio of water:isobutene in the range of 0.06 to 0.24:1 through a fixed bed of acidic cation exchange resin catalyst in liquid phase at a temperature in the range of 65° to 150° C for a sufficient time to react water and isobutene, producing only a hydrocarbon phase, recovering said hydrocarbon phase, containing t-butanol, splitting said hydrocarbon phase, cooling one portion thereof to a temperature in the range of 15° to 110° C and recycling the cooled portion to the reaction.
Claim 3
Dependent Claim
16 words
The process according to claim 1 wherein the mol ratio of water:isobutene is less than 0.24:1.
Claim 4
Dependent Claim
22 words
The process according to claim 2 wherein the temperature in the fixed bed is in the range of 65° to 120° C.
Claim 5
Dependent Claim
22 words
The process according to claim 1 wherein the amount of water is adjusted to provide that no water leaves the catalyst bed.
Claim 6
Dependent Claim
140 words
A process for the prepartion of t-butanol comprising: a. feeding a stream containing isobutene; b. mixing water and said stream in a mol ratio of 0.06 to 0.024:1, water:isobutene; c. contacting said mixture of water and isobutene with a granular fixed bed acidic cation exchange resin for a sufficient time to react water and isobutene at a temperature of reaction in the fixed bed in the range of 65° to 150° C. d. producing only a hydrocarbon phase product stream containing t-butanol; e. splitting the hydrocarbon phase product passing from said fixed bed into two portions; f. recovering and removing one portion of said hydrocarbon phase product; g. cooling one portion said hydrocarbon phase product to a temperature in the range of 15° to 110° C; and, h. recycling said cooled hydrocarbon phase product portion to step (a) or (b).
Claim 7
Dependent Claim
140 words
A process for the prepartion of t-butanol comprising: a. feeding a stream containing isobutene; b. mixing water and said stream in a mol ratio of 0.06 to 0.024:1, water:isobutene; c. contacting said mixture of water and isobutene with a granular fixed bed acidic cation exchange resin for a sufficient time to react water and isobutene at a temperature of reaction in the fixed bed in the range of 65° to 150° C. d. producing only a hydrocarbon phase product stream containing t-butanol; e. splitting the hydrocarbon phase product passing from said fixed bed into two portions; f. recovering and removing one portion of said hydrocarbon phase product; g. cooling one portion said hydrocarbon phase product to a temperature in the range of 15° to 110° C; and, h. recycling said cooled hydrocarbon phase product portion to step (a) or (b).
Claim 8
Dependent Claim
25 words
The process according to claim 5 wherein the temperature in the reaction in the fixed bed is in the range of 90° to 120° C.
Claim 9
Dependent Claim
20 words
The process according to claim 6 wherein the temperature gradient in the fixed bed is no greater than 25° C.
Claim 10
Dependent Claim
18 words
The process according to claim 5 wherein the mol ratio of water to isobutene is less than 0.2:1.
Claim 11
Dependent Claim
16 words
The process according to claim 5 wherein the acidic cation exchange resin contains sulfonic acid groups.
Claim 12
Dependent Claim
19 words
The process according to claim 5 wherein the resin has a granular size of about 0.15 to 1 mm.
Claim 13
Dependent Claim
19 words
The process according to claim 5 wherein said cooled hydrocarbon phase product portion is continuously recycled to step (a).
Claim 14
Dependent Claim
20 words
The process according to claim 5 wherein said isobutene is a component of a stream substantially comprising C 4 hydrocarbons.
Claim 15
Dependent Claim
19 words
The process according to claim 12 wherein said isobutene comprises 5 to 100 percent of said C 4 hydrocarbons.
Claim 16
Dependent Claim
20 words
The process according to claim 5 wherein said mixture of water and isobutene flow concurrently downward through said fixed bed.
Claim 17
Dependent Claim
16 words
The process according to claim 5 wherein said fixed bed is positioned in a vertical reactor.
Claim 18
Dependent Claim
35 words
The process according to claim 5 wherein the recycle hydrocarbon phase of step 5 (h) is returned to step 5 (a) or (b), in a volume ratio of 1 to 50:1, recycle:isobutene of step (a).
Claim 19
Dependent Claim
18 words
The process according to claim 5 wherein t-butanol is recovered from the hydrocarbon phase product of step (f).
Claim 20
Dependent Claim
24 words
The process according to claim 5 wherein all of the water contacting said fixed bed acidic cation exchange resin is consumed in the reaction.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-01 | 1981-10-31 | 1982-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-01 | 1985-10-31 | 1986-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-01 | 1989-10-31 | 1990-05-02 | $7700.00 | Window Closed / Lapsed |